FRESHWATER AND LAND CRAYFISHES OF AUSTRALIA 
23 
Astacopsis quadricarinatus Haswell, Cat. Austrl. Mus. Crust., 1882, 
177. 
Cheraps quadricarinatus Faxon, Proc. U.S. Nat. Mus., xx, 1898, 
p. 677 ; Ortmann, Proc. Amer. Philos. Soc., 1902, xli, p. 291 ; 
Caiman, Ann. Mag. Nat. Hist., viii, 1911, p. 366; Faxon, Mem. Mus. 
Comp. Zool., xl, 1914, p. 403. 
Chaeraps quadricarinatus Smith, Proc. Zool. Soc. Lond., 1912, p. 167. 
Astaconepkrops albertsii Nobili, Ann. Mus. Civ. Genova, xl, p. 244, 
1899; Nobili, Boll. Mus. Zool. Torina, 1903, xviii, p. 1; Faxon, 
Mem. Mus. Comp. Zool., xl, 1914, p. 404. 
Cheraps lorentsi Roux, Notes Leyden Mus., xxxiii, 1911, p. 97, figs. 
4-5. 
Cheraps aruanus Roux, Notes Leyden Mus., xxxiii, 1911, p. 88, figs. 
2-3. 
Astacopsis australasiensis Nobili, Ann. Mus. Civ. St. Nat., xl, 1899, 
p. 246; Boll. Mus. Zool. Torino, xviii, No. 445, 1903, p. 2. 
Rostrum long and slender, three and one-half times as long as broad at 
base, apex long and sharp, with three spines at each side ; carinae sharp, 
not reaching to apex, carried well back on to carapace, lateral carinae sharp. 
Squame of each second antenna very long and slender. Interantennal 
spine short and broad, sharply pointed. 
Carapace shorter than abdomen, as broad as high, areola very broad. 
Sternal keel raised, moderately sharp ; lateral processes obsolete, fourth 
pair flattened; a sharp backwardly directed spine in centre of obsolete lateral 
processes of fourth pereopods. 
Membranous portion of telson short in comparison with upper calcareous 
portion, a spine on each lateral margin at posterior third. Uropods as long 
as telson, each divided by a longitudinal median carina ending in a spine at 
junction of membranous portion, a spine on outer lateral margin at mem- 
branous border; outer rami each divided by a feeble longitudinal median 
carina, numerous small sharp spines along transverse suture. Lobes at base 
of uropods with upper lobe produced to a small sharp spine. 
Great chelae long and slender, propodus three times as long as broad, 
dactylus long and slender. Carpus with one to four small sharp spines on 
upper margin ; upper margin of merus with two sharp spines. 
Habitat.— Queensland: Cape York (type locality). Northern Territory: 
Adelaide River; Roper River (Sir B. Spencer). New Guinea: Katau ; 
Mainikion; Sabang; Baie Etna; Mimika River. Aru Islands. 
Cherax bicarinatus (Gray). 
(PI. V, figs. 21, 22.) 
Astacus bicarinatus Gray, Eyre’s Journ. Exped. Disc. Cent. Austrl., 
i (Appendix), p. 410, 1845. 
Astacus bicarinatus Erichson, Arch. f. Naturg., xii, 1846, p. 376. 
Astacopsis bicarinatus Haswell, Cat. Austrl. Mus., Crust., p. 177, 1882. 
Chaeraps intermedins Smith, Proc. Zool. Soc. Lond., 1912, p. 168. 
Cheraps preissii Er., McCulloch, Rec. West. Austrl. Mus., i, pt. 3, 1914, 
" p. 229. 
Length of average adult specimen, 140 mm. 
